897186681 has 6 divisors (see below), whose sum is σ = 1295936330. Its totient is φ = 598124448.

The previous prime is 897186637. The next prime is 897186709. The reversal of 897186681 is 186681798.

It can be written as a sum of positive squares in only one way, i.e., 892814400 + 4372281 = 29880^2 + 2091^2 .

It is not a de Polignac number, because 897186681 - 2¹¹ = 897184633 is a prime.

It is a super-2 number, since 2×897186681² = 1609887881127591522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897186181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49843696 + ... + 49843713.

Almost surely, 2^897186681 is an apocalyptic number.

It is an amenable number.

897186681 is a deficient number, since it is larger than the sum of its proper divisors (398749649).

897186681 is a wasteful number, since it uses less digits than its factorization.

897186681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99687415 (or 99687412 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The square root of 897186681 is about 29953.0746501924. The cubic root of 897186681 is about 964.4823235741.

It can be divided in two parts, 897 and 186681, that added together give a triangular number (187578 = T₆₁₂).

The spelling of 897186681 in words is "eight hundred ninety-seven million, one hundred eighty-six thousand, six hundred eighty-one".